58 Annals of the South African Museum. 



an immense mass, and owing to the very distended condition of the 

 marsupium its first plates are more visible on the dorsal than 011 the 

 ventral aspect. Also one or two of the lateral lobes are forced back 

 over the head. As in Bonnier's genus Orbionc, the peraeon is of 

 great breadth, the general outline of the body being almost circular. 

 The rather small pleon is turned sharply to the left, with the first 

 three segments very distinct. The remainder may be equally so, 

 but their smaller size and pale colour make the observation difficult. 

 The rnaxillipeds make a near approach to those figured by Bonnier 

 for Pleiirocrypta hendersoni and P. porcdlancs, and by Hansen for 

 Cryptione elongata. The little un jointed palp is here rather thickly 

 fringed with setse on the inner margin. My dissection was not 

 sufficiently successful to show the articulations displayed in Hansen's 

 figure, so that my drawing does not distinguish the maxilliped itself 

 from that hind border of the head which carries at its angle the two 

 fleshy lobes represented. 



The limbs of the peraeon, though longer, are less robust in the 

 female than in the male. The sixth joint is oblong with a slight 

 curvature, the small palm having a little emargination almost 

 masked by the tightly clasped finger. 



Concerning the pleon, Hansen says : " Pleural plates not developed. 

 The pleopods quite soft, of medium size, decreasing conspicuously in 

 size from before backwards and attached to the lateral margin ; each 

 pleopod consists of a short peduncle and two lamellar oblong rami ; 

 the outer ramus much larger than the inner one. The uropods 

 biramous ; the outer ramus a little smaller than the outer of the 

 fifth pleopod, the inner ramus very short, almost rudimentary. The 

 pleopods are curled to such a degree that it would have been 

 impossible without much construction to draw a sketch of the 

 abdomen." Rashly, perhaps, in face of the last clause, I offer an 

 outline of the pleon in dorsal view, so far as I have been able to 

 make it out, for comparison with the verbal description. 



The male was attached to the left side of the female, as shown in 

 the figures, with his pleon adjacent to her third peraeon segment, 

 and his head placed on the right side of her uropods. The relatively 

 great size of this sex, the incisions separating the segments of the 

 peraeon, the pleon without pleopods or uropods, the antennae and 

 mouth organs, the limbs with deeply concave palm, are all in agree- 

 ment with Hansen's figures and description. Here the front margin 

 of the head is evenly rounded, not flattened, as in Hansen's specimen ; 

 but the difference is trivial. Here the pleon on the underside 

 shows a partial longitudinal and two transverse folds. Also there 



